Add CHANGELOG.md back in
Add CHANGELOG.md back in


Users should have an option to see a changelog for this gem offline, so
CHANGELOG.md was re-added to the project. It follows most of the
guidelines at http://keepachangelog.com/, and content is copied from
the GitHub Releases page (https://github.com/leesharma/rescuetime/releases).
leesharma/rescuetime,leesharma/rescuetime